Symptoms
Boot Camp Support Software 6.1 Download
If you are trying to update to the May 2019 Feature Update for Windows 10 (Windows 10, version 1903), you may experience an update compatibility hold and receive the message, 'Mac HAL Driver - machaldriver.sys: Your PC has a driver or service that isn't ready for this version of Windows 10.'
Cause
- Install Windows on your Mac. Boot Camp is a utility that comes with your Mac and lets you switch between macOS and Windows. Download your copy of Windows 10, then let Boot Camp Assistant walk you through the installation steps for Intel-based Macs.
- Supported Systems Name Description Revision Number File Size Release Date Download Link Mac Pro (2019-2020) with Radeon Pro 580x, Radeon Pro Vega II and Radeon Pro W5700X / W5500X Boot Camp Driver for Windows 10 Display Driver AMD Radeon Settings 19.40 557 MB 7/08/2020.
Boot Camp; Note: IESVE will run on 64bit versions of Windows, but it will run as a 32bit application. Our Radiance, Microflo and SunCast applications support multithreading. Software Required: Microsoft® Internet Explorer 7.0 or higher.NET Framework 2.0 from Microsoft; Minimum Hardware: 1152 x 864 screen resolution; Dedicated OpenGL-compliant.
Mac devices prior to 2012 or newer Mac devices with the older Apple Boot Camp or Windows Support Software drivers have a compatibilty hold in place and are unable to update to Windows 10, version 1903. Specifically, devices with MacHALDriver.sys dated September 24, 2011 01:57:09 or older in Windowssystem32drivers are affected.
Workaround
Updating your Apple Boot Camp Windows Support Software drivers may allow you to update to Windows 10, version 1903. For instructions, please see the Apple support article here.
Bootcamp 6.1 Support Software Download
Next steps
We are working on a resolution and estimate a solution will be available in late July.